Do i need any kind of permission to sell my stuff on ebay?

Question

like books or games

Answer 1

not as long as you are the legal owner of the items and over 18

if you are a minor your parents would have to sell it for you because you cannot enter into a contract.

Answer 2

nope!  well...unless it's not really yours, and as long as you're 18.  but other than that, you just sign up for a seller's acocunt and you're good to go!